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What is the usefulness of `enable_shared_from_this`?
I ran across enable_shared_from_this while reading the Boost.Asio examples and after reading the documentation I am still lost for how this should correctly be used. Can someone please give me an example and explanation of when using this class makes sense.
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Python timedelta in years
... number of years have been since some date. Currently I've got timedelta from datetime module and I don't know how to convert it to years.
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Python module for converting PDF to text [closed]
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Try PDFMiner. It can extract text from PDF files as HTML, SGML or "Tagged PDF" format.
The Tagged PDF format seems to be the cleanest, and stripping out the XML tags leaves just the bare text.
A Python 3 version is available under:
https://github.com/pdfm...
Git: How to remove file from index without deleting files from any repository
...git checkout (per comment by William Pursell; but remember to re-remove it from the index!):
git checkout @{1} -- foo.conf && git rm --cached foo.conf
If they have taken other actions since pulling your deletion (or they are pulling with rebase into a detached HEAD), they may need somethi...
How to convert floats to human-readable fractions?
...l number
** David Eppstein / UC Irvine / 8 Aug 1993
**
** With corrections from Arno Formella, May 2008
**
** usage: a.out r d
** r is real number to approx
** d is the maximum denominator allowed
**
** based on the theory of continued fractions
** if x = a1 + 1/(a2 + 1/(a3 + 1/(a4 + ...)))
** t...
+ operator for array in PHP?
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Quoting from the PHP Manual on Language Operators
The + operator returns the right-hand array appended to the left-hand array; for keys that exist in both arrays, the elements from the left-hand array will be used, and the matchi...
Importing variables from another file?
How can I import variables from one file to another?
8 Answers
8
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Move an array element from one array position to another
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Here's a one liner I found on JSPerf....
Array.prototype.move = function(from, to) {
this.splice(to, 0, this.splice(from, 1)[0]);
};
which is awesome to read, but if you want performance (in small data sets) try...
Array.prototype.move2 = function(pos1, pos2) {
// local variables
v...
Branch from a previous commit using Git
If I have n commits, how can I branch from the n-3 commit?
19 Answers
19
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Can someone explain __all__ in Python?
...eleased today (or in 2012, even), the recommended practice would be to use from tk import *. I think the practice is accepted due to inertia, not intentional design.
– chepner
Nov 6 '19 at 15:36
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